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                Maishroom & Table                </h1>
                <p>时间限制：10s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：256MB</p>			</div>
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                                <h3>题目描述</h3><p><div>Maishroom拿到了一张H格高W格宽的数表，其中左上角的数是0，其他数都在0到S之间（含）。Maishroom想从左上角走到右下角，每一步只能向下或向右走，使得路径上数之和最大。</div>
<div>这是个有趣的题目，因为有一个正确性显然不对的贪心算法。</div>
<div>Greedily_Act(Now_h, Now_w)</div>
<div>If Now_w == W</div>
<div>&nbsp; &nbsp; MOVE_DOWN</div>
<div>Else If Now_h == H</div>
<div>&nbsp; &nbsp; MOVE_RIGHT</div>
<div>Else If V[Now_h][Now_w + 1] &gt;= V[Now_h + 1][Now_w]</div>
<div>&nbsp; &nbsp; MOVE_RIGHT</div>
<div>Else</div>
<div>&nbsp; &nbsp; MOVE_DOWN</div>
<div>End</div>
<div>Maishroom知道你们用脚趾头都能做出原来那道题，</div>
<div>于是现在他的问题是：求出有多少种数表，满足在该贪心算法下的答案为S。</div>
<p></p></p><hr/><h3>输入格式</h3><p><div>一行四个整数，H, W, S, P。P是素数。</div>
<p></p></p><hr/><h3>输出格式</h3><p><div>一个整数，为答案对P取模的结果。</div>
<p></p></p><hr/><h3>样例输入</h3><pre>2 2 2 1000000007	</pre><hr/><h3>样例输出</h3><pre>9</pre><hr/><h3>提示</h3><p><div>对于100%的数据：1&le;H, W, S&le;10^6, 108&le;P&le;2^30，P是素数。</div>
<div></div>
<p></p></p><hr/><h3>题目来源</h3><p>没有写明来源</p>
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